In bryophytes a morphological species concept is still most commonly employed, but delimitation of closely related species based on morphological characters is often difficult. Here we test morphological species circumscriptions in a species complex of the moss genus Racomitrium, the R. canescens complex, based on variable DNA sequence markers from the plastid (rps4-trnT-trnL region) and nuclea...

High temperature can induce the production of 2n gametes and aborted pollen during microsporogenesis in Populus canescens. However, mechanism by which high induces abortion remains unknown. Here, was induced exposing male flower buds P. canescens to 38 41 °C; morphology, meiotic abnormalities, defects microtubular cytoskeleton, tapetum development were characterized. We found that dominant stag...

BACKGROUND AND AIMS In contrast to seeds, high sensitivity of vegetative fragments to unfavourable environments may limit the expansion of clonal invasive plants. However, clonal integration promotes the establishment of propagules in less suitable habitats and may facilitate the expansion of clonal invaders into intact native communities. Here, we examine the influence of clonal integration on...

The ichneumonid parasitoid, C. chlorideae is an important natural enemy of pod borer/bollworm, Helicoverpa armigera (Hubner) in different agro-ecosystems. The sex-ratio of parasitoids has an important bearing on the population build up of the natural enemies for biological control of insect pests. Therefore, the present studies were conducted to gain an understanding of the influence of mating ...

An indolizidine alkaloid (swainsonine) was isolated from the plant Swainsona canescens. Swainsonine is a specific and potent inhibitor of alpha-mannosidase (EC 3.2.1.24) and when administered to animals produces a phenocopy of the genetically based lysosomal storage disease, mannosidosis. Evidence is presented to suggest that swainsonine is a reversible active site-directed inhibitor of lysosom...

In silico sequence diversities of four orthologous plant gsh1 genes and their anino acid translates of GSH1 proteins (Glutathione Synthase) were compared to the non-orthologous prokaryotic gshI/GSHI gene/protein of E. coli (NCBI # X03954). Primer pair was designed and transgene detection was carried out in two types of gshI-transgenic poplar clones (Populus x canescens) of ggs11 (cyt-ECS) and l...